宽带输出PM580掺杂聚甲基丙烯酸甲酯固体染料激光器研究

采用高效激光染料PM580作为掺杂物质，聚甲基丙烯酸甲酯(PMMA)作为基质，在对固体染料光谱特性研究的基础上，重点研究了调Q倍频Nd:YAG抽运下不同染料掺杂浓度的固体染料激光输出特性.研究结果表明掺杂浓度对输出激光波长影响明显，随着掺杂浓度的增加，激光输出波长红移，从激光增益出发，对该现象给出了理论解释.掺杂浓度对激光转化效率也有影响，当掺杂浓度为2×10^－4mol/L时，获得染料激光输出斜率效率最高达53.8%，抽运能量410mJ时，获得染料激光输出220mJ，激光带宽～8nm 关键词： 固体染料 宽带染料激光 PM580 聚甲基丙烯酸甲酯

Investigation of broadband solid state dye laser based on PM580 doped PMMA

As solid-state dye lasers exhibit the attractive features of compactness， being intoxic, and low cost, the development of tunable solid-state dye lasers is an area of active research. Solid state dyes based on polymethyl methacylate (PMMA) doped with new high efficiency pyrromethene-580 were prepared. First, the absorption and fluorescence of the samples were obtained. Pumped by the second harmonic of Q switched Nd:YAG laser, the output characteristics of the solid state dye lasers with different dye concentrations were studied. The central wavelength of the lasing emission peak increases with increasing dye concentration. The slope efficiencies of the samples were also obtained. The highest slope efficiency of 53.8% was obtained with dye concentration of about 2×10^－4 mol/L. Pumped at 410mJ, the pulse energy of the solid dye laser reached 220mJ with the band width～8nm.